.title {
    margin: 0;
    margin-bottom: 5px;
    font-size: 44px;
}

.subtitle {
    display: flex;
    align-items: center;
    font-weight: 300;
    font-size: 16px;
    opacity: 0.8;
    margin-bottom: 20px;
}

.ball {
    margin: 0 5px;
    width: 3px;
    height: 3px;
    background: #000;
    border-radius: 50%;
}

.content-list {
    width: 100%;
}

.content-item {
    margin-bottom: 30px;
}

.span {
    display: block;
    margin-left: 10px;
    margin-bottom: 5px;
    font-size: 16px;
    font-weight: 300;
    color: #000;
}

.content-item > p {
    margin: 0;
    font-size: 22px;
    text-align: justify;
}

.file-list {
    margin-bottom: 20px;
}

.file-item {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.file-item:not(:last-child) {
    margin-bottom: 15px;
}

.file-label {
    position: relative;
    padding: 5px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    width: 100%;
    font-size: 18px;
    border: 2px solid;
    border-radius: 10px;
    cursor: pointer;
}

.docx {
    background: rgba(16, 58, 132, 0.12);
    color: #1f68e9ba;
    border-color: #1f68e9ba;
}

.ppt {
    background-color: rgba(132, 86, 16, .12);
    color: #d5731ee3;
    border-color: #d5731ee3;
}

.txt {
    background-color: rgba(213, 213, 213, 0.12);
    color: #929292;
    border-color: #929292;
}

.download-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.download-link::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.other-files-title {
    margin-bottom: 20px;
    padding-left: 13px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    font-size: 15px;
    font-weight: 300;
    color: #8b8b8b;
}

.line {
    position: relative;
    display: block;
    width: calc(100% - 60px);
    height: 1px;
    background: #8b8b8b;
    border-radius: 10px;
}

.other-file-list {
    display: flex;
    flex-wrap: wrap;
}

.other-file-item {
    position: relative;
    margin-top: 10px;
    padding: 5px 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    border: 1px solid #00000030;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 400;
}

.form-video {
    display: flex;
    align-items: flex-start;
    gap: 5px;
}

.form-input {
    margin-bottom: 5px;
    display: block;
    width: 100%;
    padding: 10px;
    min-width: 200px;
    font-size: 16px;
    border-radius: 10px;
    border: 1px solid rgba(0,0,0,0.3);
}

.btn {
    padding: 10px 0;
    border-radius: 5px;
    max-width: 0px;
    font-size: 16px;
    background: #4472e9;
    color: #ffffff;
    opacity: 0;
    border: none;
    outline: none;
    cursor: pointer;
    transition: background 0.3s linear, max-width 0.3s cubic-bezier(0, 1, 0, 1), padding 0.3s cubic-bezier(0, 1, 0, 1);
}

.btn:hover {
    background: #5280f5;
}

.btn:active {
    background: #3a65d3;
}

.btn-active {
    max-width: 150px;
    padding: 10px 30px;
    opacity: 1;
    transition: background 0.3s linear, max-width 0.3s cubic-bezier(1, 0, 1, 0), padding 0.3s cubic-bezier(1, 0, 1, 0), opacity 0.3s cubic-bezier(1, 0, 1, 0);
}

.iframe {
    width: 100%;
    height: 400px;
    opacity:  0;
    position: absolute;
    z-index: -10;
    top: 0;
}

.iframe-active {
    position: relative;
    opacity: 1;
    z-index: 1;
    top: auto;
}

.video-span {
    display: block;
    padding-left: 10px;
    margin-bottom: 10px;
    font-size: 14px;
    font-weight: 700;
    color: #8b8b8b;
}